Back to Texas Instruments

Texas Instruments TPA3144D2 Class-D Audio Amplifier

Texas Instruments TPA3144D2 Class-D Audio Amplifier is an efficient, Class-D audio power amplifier for driving bridged-tied stereo speakers at up to 6W at 6Ω or 8Ω (per channel). This amplifier uses Advanced EMI Suppression Technology with Spread Spectrum Control and a 1SPW modulation scheme. TPA3144D2 is fully protected against shorts and overload. It also includes SpeakerGuard™ speaker protection circuitry with an adjustable Automatic Gain Limit (AGL), an adjustable power limiter, and a DC detection circuit for protection of the connected speakers. The AGL allows adjustment of the maximum output voltage without signal clipping for enhanced speaker protection and audio quality.

Features

  • 2x6 W/ch into 4Ω Loads at 10% THD+N from a 7V Supply
  • 2x6 W/ch into 6Ω Loads at 10% THD+N from a 9.5V Supply
  • 2x6 W/ch into 8Ω Loads at 10% THD+N from a 10V Supply
  • Up to 90% Efficient Class-D Operation (8Ω) Eliminates Need for Heat Sinks
  • <0.05% THD+N at 1W/4Ω/1kHz
  • <65µV A-wgt Output Noise
  • Wide Supply Voltage Range Allows Operation SpeakerGuard speaker protection circuitry includes from 4.5V to 14.4V
  • Inductor-Free Operation
  • Enhanced EMI Performance with Spread Spectrum and 1SPW Operation
  • SpeakerGuard Speaker Protection Includes Automatic Gain Limit, Adjustable Power Limiter and DC Protection
  • Robust Pin-to-Pin, Pin-to-Ground and Pin-to-Power Short Circuit Protection and Thermal Protection
  • Four Selectable, Fixed Gain Settings
  • Single Ended or Differential Analog Inputs
  • Click and Pop Free Startup

Applications

  • Televisions
  • BT Speakers
  • Wireless Speakers
  • Mini Speakers
  • USB Speakers
  • Consumer Audio Equipment

Simplified Schematic

Texas Instruments TPA3144D2 Class-D Audio Amplifier
Published: 2015-10-28 | Updated: 2022-03-11